It's been 100 years since electric cars ruled the roads of industrial countries, until they were replaced by the internal combustion engine. But now, in Europe, China — and especially the US — electric cars are seen as the wave of the future. It won't be long before they're talking to one another. We hear how they're getting a boost from the scandalous cheating by Volkswagen and others to deceive the public about so-called "clean diesel." Car makers, government regulators and savvy investors predict the demand for electric cars is about to go through the roof.